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Science Exam Prep
Study prep for MICDS science exam
Terms in this set (22)
The passing of physical characteristics from parents to offspring
Each different form of a characteristic (such as stem height or seed color)
The scientific study of heredity
The process by which a sperm and an egg join together
The offspring of many generations that have the same trait
The factor that controls the trait
Different forms of a gene
One whose trait always shows up in the organism where the allele is present (it only takes one of these alleles to get its trait)
An allele that's hidden when there is a dominant allele present
An organism that has two different alleles for a trait
A number that describes how likely it is that an event will occur
A chart that shows all the possible combinations of alleles that can result from a genetic cross
An organism's physical appearance or visible trait.
The genetic makeup of a trait (such as TT, Tt, and tt)
When an organism has two of the same allele for a trait
When an organism has two different alleles for a trait
When there are no recessive nor dominant alleles, both appear in the offspring.
Where the traits mix (if a white flower and red flower mated, their offspring would be pink in incomplete dominance)
What is the chromosome theory of inheritance?
That genes are carried from parents to their offspring on chromosomes.
The process by which the number of chromosomes is reduced by half to form sex cells
What occurs during meiosis?
During meiosis, the chromosome pairs separate and are distributed to two different cells. The resulting sex cells have only half as many chromosomes as the other cells in the organism
How many chromosomes are in the human body?
46 divided up into 23 pairs
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